856514632566 has 16 divisors (see below), whose sum is σ = 1713045423600. Its totient is φ = 285502184448.

The previous prime is 856514632553. The next prime is 856514632573. The reversal of 856514632566 is 665236415658.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80790 + ... + 1311318.

It is an arithmetic number, because the mean of its divisors is an integer number (107065338975).

Almost surely, 2^856514632566 is an apocalyptic number.

856514632566 is an abundant number, since it is smaller than the sum of its proper divisors (856530791034).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

856514632566 is a wasteful number, since it uses less digits than its factorization.

856514632566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346543.

The product of its digits is 31104000, while the sum is 57.

The spelling of 856514632566 in words is "eight hundred fifty-six billion, five hundred fourteen million, six hundred thirty-two thousand, five hundred sixty-six".